Where in Black version are you able to use Dive and Waterfall?

Question

Need this so I can go back to these areas with my HM Slave, since I don't carry one around.

Comments

Just so you know trachy, I edited to put the whole question in the title. It makes it much easier to know what it's about before clicking through to read the whole thing :)

Answer 1

Dive
Undella Bay (unlocks the Abyssal Ruins)

Waterfall
Lostlorn Forest - Near the entrance
Route 11 - North of the west bridge
Route 11 - East end of river
Route 14 - Interspersed throughout (unlocks the Abundant Shrine)
Route 20 - Near the southeastern pond (B2W2 only)
Victory Road - In the center of the outside (B2W2 only)

Dive (Bulbapedia)
Waterfall (Bulbapedia)

Answer 2

Dive is only used to enter the ruins a little East of Undella Town, I believe. The feature is brought back to life, albeit in a relatively bland way.

As for Waterfall, there are a few of them located all throughout the post-Elite Four areas (Eastern Unova). I don't remember the exact locations, but it's a linear path anyway, and are easy to spot. The best you get form the Waterfalls are trainers and a couple items, including a rare candy.

Comments

I need exact area, seeing as I already went through Unova, just without a Pokemon with Waterfall or Dive. I'm forgetful, ad I don't want to go around again.

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It's the bits just south of Undella, I think.

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Also you use Waterfall to access the abundant shrine